diff --git a/Kill.c b/Kill.c
index ff52561..d4767e2 100644
--- a/Kill.c
+++ b/Kill.c
@@ -37,7 +37,8 @@ int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
 	 * Returns:
 	 *  0 - a zero superblock was successfully written out
 	 *  1 - failed to write the zero superblock
-	 *  2 - failed to open the device or find a superblock.
+	 *  2 - failed to open the device.
+	 *  4 - failed to find a superblock.
 	 */
 
 	int fd, rv = 0;
@@ -57,7 +58,7 @@ int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
 		if (verbose >= 0)
 			pr_err("Unrecognised md component device - %s\n", dev);
 		close(fd);
-		return 2;
+		return 4;
 	}
 	st->ignore_hw_compat = 1;
 	rv = st->ss->load_super(st, fd, dev);
diff --git a/mdadm.c b/mdadm.c
index 1cf5c18..25a1abd 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1959,7 +1959,7 @@ static int misc_list(struct mddev_dev *devlist,
 					rv |= Kill(dv->devname, NULL, c->force, v, 0);
 					v = -1;
 				} while (rv == 0);
-				rv &= ~2;
+				rv &= ~4;
 			}
 			continue;
 		case 'Q':